George Lucas: “You have to work not to be angry”
“Obviously, there are people that just do the easy thing, and the easy thing is to be angry, which turns to hate. It’s not an active thing; it’s a passive thing. Being angry with somebody is a passive thing. You have to work not to be angry, and if you don’t work at it, you’ll just be angry for the rest of your life. Bitter, angry, and of course that leads to suffering – it’s the bad side.”
– George Lucas, Star Wars Archives